A murderer strikes on board the luxury Nile steamer 'Karnak' - and Hercule Poirot faces his most baffling case. Set against the sumptuous scenery of the Nile, the events of this murder mystery are played out by a gallery of memorable characters. A newlywed heiress is found murdered while on a luxury cruise down the Nile. Can the killer be found before the ship of clues reaches the end of its murderous journey?